135085889 has 2 divisors, whose sum is σ = 135085890. Its totient is φ = 135085888.

The previous prime is 135085883. The next prime is 135085897. The reversal of 135085889 is 988580531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93702400 + 41383489 = 9680^2 + 6433^2 .

It is an emirp because it is prime and its reverse (988580531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135085889 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (135085883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67542944 + 67542945.

It is an arithmetic number, because the mean of its divisors is an integer number (67542945).

Almost surely, 2^135085889 is an apocalyptic number.

It is an amenable number.

135085889 is a deficient number, since it is larger than the sum of its proper divisors (1).

135085889 is an equidigital number, since it uses as much as digits as its factorization.

135085889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 135085889 is about 11622.6455250085. The cubic root of 135085889 is about 513.1015521427.

The spelling of 135085889 in words is "one hundred thirty-five million, eighty-five thousand, eight hundred eighty-nine".